Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine

Ahmed Ketata; Zied Driss

doi:doi:10.11648/j.ijfmts.20170305.11

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Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine

Ahmed Ketata, Zied Driss

Published in International Journal of Fluid Mechanics & Thermal Sciences (Volume 3, Issue 5)

Received: 10 October 2017 Accepted: 23 October 2017 Published: 25 November 2017

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Abstract

A turbocharger is commonly used to get more available output power for internal combustion engines. The radial turbine recovers the engine exhaust gas energy and converts it into rotational energy. The turbocharger turbine consists mostly in a radial or mixed flow impeller and a volute. The turbocharger volute transforms a part of the engine exhaust gas energy into a kinetic energy and guides the movement towards the rotor inducer at a suitable flow angle. The main purpose of this paper is to study the flow structure within a vanned volute of a mixed flow turbine. For this end, numerical simulations are conducted by solving the Navier-Stokes equations using the commercial Computational Fluid dynamiX (CFX) package and including a finite volume discretization method. The reasonable agreement found between experimental and numerical results of the turbine performance confirms the accuracy of the numerical model. The distributions of the pressure, the velocity, and the turbulence characteristics are numerically obtained in this analysis. The results showed that the fluid flow within the turbine volute is highly turbulent. Moreover, a significant pressure damp has been recorded within the volute vane which leads to a low-pressure flow at the rotor entry. Also, it has been shown that the flow direction considerably turns from the radial direction to the tangential one across the volute casing.

Published in	International Journal of Fluid Mechanics & Thermal Sciences (Volume 3, Issue 5)
DOI	10.11648/j.ijfmts.20170305.11
Page(s)	46-51
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

CFD, Turbulence, Mixed-Flow Turbine, Turbocharger, Performance, Mass Flow Rate, Efficiency

References

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[2]	F. Gu, A. Engeda, E. Benisek, A comparative study of incompressible and compressible design approaches of radial inflow turbine volutes, Proc Inst Mech Eng 215 (2001) 475-486.
[3]	M. C. S. Barnard, R. S. Benson, Radial gaz turbines, Proc. IMechE 183 (1968) 59-70.
[4]	Chen H, Design methods of volute casings for turbocharger turbine applications, J Power Energy 210 (1996) 149-156.
[5]	Chen H, A discussion on volute design method for radial inflow turbines, ASME paper GT2009-59110 (2009).
[6]	A. Romagnoli, R. F. Martinez-Botas, Performance prediction of a nozzled and nozzleless mixed-flow turbine in steady conditions, International Journal of Mechanical Science 53 (2011) 557–574.
[7]	M. Yang, R. Martinez Botas, S. Rajoo, T. Yokoyama, S. Ibaraki, Influence of volute cross-sectional shape of a nozzleless turbocharger turbine under pulsating flow condi-tions, Proceedings of ASME Turbo Expo 2014: GT2014-26150 (2014).
[8]	M. Yang, R. Martinez Botas, S. Rajoo, T. Yokoyama, S. Ibaraki, An investigation of volute cross-sectional shape on turbocharger turbine under pulsating conditions in internal combustion engine, Energy Conversion and Management 105 (2015) 167–177.
[9]	J. F. Suhrmann, D. Peitsch, M. Gugau, T. Heuer, On the effect of volute tongue design on radial turbine performance, ASME paper GT2012-69525 (2012).
[10]	M. Abidat, M. K. Hamidou, M. Hachemi, M. Hamel, Design and flow analysis of radial and mixed flow turbine volutes, ASME paper GT2008-50503:2329-2338 (2008).
[11]	S. Rajoo, Steady and pulsating performance of a variable geometry mixed flow turbochager turbine, PhD thesis, Imperial College, London, 2007.
[12]	M. Abidat, Design and testing of a highly loaded mixed flow turbine. PhD thesis, Imperial College, London, 1991.
[13]	Z. Driss, O. Mlayeh, S. Driss, D. Driss, M. Maaloul, M. S. Abid, Study of the incidence angle effect on the aerodynamic structure characteristics of an incurved Savonius wind rotor placed in a wind tunnel, Energy 894 (2016) 908-113.
[14]	Z. Driss, O. Mlayeh, D. Driss, M. Maaloul, M. S. Abid, Numerical simulation and experimental validation of the turbulent flow around a small incurved Savonius wind rotor, Energy 74 (2014) 506-17.
[15]	J. W. Lam, Q. Roberts, G. McDonnel, Flow modelling of a turbocharger turbine under pulsating flow, Preceedings of IMechE International Conference on Turbochargers and Turbocharging (2002) 181-197.

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APA Style

Ahmed Ketata, Zied Driss. (2017). Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine. International Journal of Fluid Mechanics & Thermal Sciences, 3(5), 46-51. https://doi.org/10.11648/j.ijfmts.20170305.11

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ACS Style

Ahmed Ketata; Zied Driss. Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine. Int. J. Fluid Mech. Therm. Sci. 2017, 3(5), 46-51. doi: 10.11648/j.ijfmts.20170305.11

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AMA Style

Ahmed Ketata, Zied Driss. Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine. Int J Fluid Mech Therm Sci. 2017;3(5):46-51. doi: 10.11648/j.ijfmts.20170305.11

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@article{10.11648/j.ijfmts.20170305.11,
  author = {Ahmed Ketata and Zied Driss},
  title = {Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine},
  journal = {International Journal of Fluid Mechanics & Thermal Sciences},
  volume = {3},
  number = {5},
  pages = {46-51},
  doi = {10.11648/j.ijfmts.20170305.11},
  url = {https://doi.org/10.11648/j.ijfmts.20170305.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijfmts.20170305.11},
  abstract = {A turbocharger is commonly used to get more available output power for internal combustion engines. The radial turbine recovers the engine exhaust gas energy and converts it into rotational energy. The turbocharger turbine consists mostly in a radial or mixed flow impeller and a volute. The turbocharger volute transforms a part of the engine exhaust gas energy into a kinetic energy and guides the movement towards the rotor inducer at a suitable flow angle. The main purpose of this paper is to study the flow structure within a vanned volute of a mixed flow turbine. For this end, numerical simulations are conducted by solving the Navier-Stokes equations using the commercial Computational Fluid dynamiX (CFX) package and including a finite volume discretization method. The reasonable agreement found between experimental and numerical results of the turbine performance confirms the accuracy of the numerical model. The distributions of the pressure, the velocity, and the turbulence characteristics are numerically obtained in this analysis. The results showed that the fluid flow within the turbine volute is highly turbulent. Moreover, a significant pressure damp has been recorded within the volute vane which leads to a low-pressure flow at the rotor entry. Also, it has been shown that the flow direction considerably turns from the radial direction to the tangential one across the volute casing.},
 year = {2017}
}

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TY  - JOUR
T1  - Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine
AU  - Ahmed Ketata
AU  - Zied Driss
Y1  - 2017/11/25
PY  - 2017
N1  - https://doi.org/10.11648/j.ijfmts.20170305.11
DO  - 10.11648/j.ijfmts.20170305.11
T2  - International Journal of Fluid Mechanics & Thermal Sciences
JF  - International Journal of Fluid Mechanics & Thermal Sciences
JO  - International Journal of Fluid Mechanics & Thermal Sciences
SP  - 46
EP  - 51
PB  - Science Publishing Group
SN  - 2469-8113
UR  - https://doi.org/10.11648/j.ijfmts.20170305.11
AB  - A turbocharger is commonly used to get more available output power for internal combustion engines. The radial turbine recovers the engine exhaust gas energy and converts it into rotational energy. The turbocharger turbine consists mostly in a radial or mixed flow impeller and a volute. The turbocharger volute transforms a part of the engine exhaust gas energy into a kinetic energy and guides the movement towards the rotor inducer at a suitable flow angle. The main purpose of this paper is to study the flow structure within a vanned volute of a mixed flow turbine. For this end, numerical simulations are conducted by solving the Navier-Stokes equations using the commercial Computational Fluid dynamiX (CFX) package and including a finite volume discretization method. The reasonable agreement found between experimental and numerical results of the turbine performance confirms the accuracy of the numerical model. The distributions of the pressure, the velocity, and the turbulence characteristics are numerically obtained in this analysis. The results showed that the fluid flow within the turbine volute is highly turbulent. Moreover, a significant pressure damp has been recorded within the volute vane which leads to a low-pressure flow at the rotor entry. Also, it has been shown that the flow direction considerably turns from the radial direction to the tangential one across the volute casing.
VL  - 3
IS  - 5
ER  -

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Author Information

Ahmed Ketata

Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax (ENIS), University of Sfax, Sfax, Tunisia
Zied Driss

Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax (ENIS), University of Sfax, Sfax, Tunisia

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Plain Text BibTeX RIS

APA Style

Ahmed Ketata, Zied Driss. (2017). Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine. International Journal of Fluid Mechanics & Thermal Sciences, 3(5), 46-51. https://doi.org/10.11648/j.ijfmts.20170305.11

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ACS Style

Ahmed Ketata; Zied Driss. Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine. Int. J. Fluid Mech. Therm. Sci. 2017, 3(5), 46-51. doi: 10.11648/j.ijfmts.20170305.11

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AMA Style

Ahmed Ketata, Zied Driss. Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine. Int J Fluid Mech Therm Sci. 2017;3(5):46-51. doi: 10.11648/j.ijfmts.20170305.11

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@article{10.11648/j.ijfmts.20170305.11,
  author = {Ahmed Ketata and Zied Driss},
  title = {Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine},
  journal = {International Journal of Fluid Mechanics & Thermal Sciences},
  volume = {3},
  number = {5},
  pages = {46-51},
  doi = {10.11648/j.ijfmts.20170305.11},
  url = {https://doi.org/10.11648/j.ijfmts.20170305.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijfmts.20170305.11},
  abstract = {A turbocharger is commonly used to get more available output power for internal combustion engines. The radial turbine recovers the engine exhaust gas energy and converts it into rotational energy. The turbocharger turbine consists mostly in a radial or mixed flow impeller and a volute. The turbocharger volute transforms a part of the engine exhaust gas energy into a kinetic energy and guides the movement towards the rotor inducer at a suitable flow angle. The main purpose of this paper is to study the flow structure within a vanned volute of a mixed flow turbine. For this end, numerical simulations are conducted by solving the Navier-Stokes equations using the commercial Computational Fluid dynamiX (CFX) package and including a finite volume discretization method. The reasonable agreement found between experimental and numerical results of the turbine performance confirms the accuracy of the numerical model. The distributions of the pressure, the velocity, and the turbulence characteristics are numerically obtained in this analysis. The results showed that the fluid flow within the turbine volute is highly turbulent. Moreover, a significant pressure damp has been recorded within the volute vane which leads to a low-pressure flow at the rotor entry. Also, it has been shown that the flow direction considerably turns from the radial direction to the tangential one across the volute casing.},
 year = {2017}
}

Copy | Download

TY  - JOUR
T1  - Numerical Study of the Flow Within a Vanned Volute of a Mixed Flow Turbine
AU  - Ahmed Ketata
AU  - Zied Driss
Y1  - 2017/11/25
PY  - 2017
N1  - https://doi.org/10.11648/j.ijfmts.20170305.11
DO  - 10.11648/j.ijfmts.20170305.11
T2  - International Journal of Fluid Mechanics & Thermal Sciences
JF  - International Journal of Fluid Mechanics & Thermal Sciences
JO  - International Journal of Fluid Mechanics & Thermal Sciences
SP  - 46
EP  - 51
PB  - Science Publishing Group
SN  - 2469-8113
UR  - https://doi.org/10.11648/j.ijfmts.20170305.11
AB  - A turbocharger is commonly used to get more available output power for internal combustion engines. The radial turbine recovers the engine exhaust gas energy and converts it into rotational energy. The turbocharger turbine consists mostly in a radial or mixed flow impeller and a volute. The turbocharger volute transforms a part of the engine exhaust gas energy into a kinetic energy and guides the movement towards the rotor inducer at a suitable flow angle. The main purpose of this paper is to study the flow structure within a vanned volute of a mixed flow turbine. For this end, numerical simulations are conducted by solving the Navier-Stokes equations using the commercial Computational Fluid dynamiX (CFX) package and including a finite volume discretization method. The reasonable agreement found between experimental and numerical results of the turbine performance confirms the accuracy of the numerical model. The distributions of the pressure, the velocity, and the turbulence characteristics are numerically obtained in this analysis. The results showed that the fluid flow within the turbine volute is highly turbulent. Moreover, a significant pressure damp has been recorded within the volute vane which leads to a low-pressure flow at the rotor entry. Also, it has been shown that the flow direction considerably turns from the radial direction to the tangential one across the volute casing.
VL  - 3
IS  - 5
ER  -

Copy | Download